| 摘要 |
A method and a device for extending the lifetime of a Christmas tree (10), the Christmas tree (10) being provided with at least a first high-pressure hydraulic valve pack (12), a first low-pressure hydraulic valve pack (14) or a first chemical valve pack (16), and the Christmas tree (10) being arranged to be connectable to an umbilical (22) which comprises at least electrical power or control cables (24), hydraulic tubes (26, 28) or chemical tubes (30), and the method comprising the following steps: - retrofitting an upgrading module (50) to or by the Christmas tree (10) and connecting the upgrading module (50) to the Christmas tree (10) with the necessary number of tube and wire connections, the upgrading module (50) comprising a second control module (62), and at least a hydraulic high-pressure pump (66) with a second high-pressure valve pack (61) and a hydraulic reservoir (70), a hydraulic low-pressure pump (80) with a second low-pressure hydraulic valve pack (82) and a hydraulic reservoir (86) or a chemical pump (92) with a chemical reservoir (96); - supplying the second control module (62) with electrical power and control signals via the umbilical (22) or from a vessel; and - supplying at least the high-pressure pump (66), the low-pressure pump (80) or the chemical pump (92), directly or indirectly via their respective reservoirs (70, 86, 96), with hydraulic fluid via the umbilical (22) or from a vessel. |
